DE202015006341U1 - pump cassette - Google Patents

pump cassette Download PDF

Info

Publication number
DE202015006341U1
DE202015006341U1 DE202015006341.1U DE202015006341U DE202015006341U1 DE 202015006341 U1 DE202015006341 U1 DE 202015006341U1 DE 202015006341 U DE202015006341 U DE 202015006341U DE 202015006341 U1 DE202015006341 U1 DE 202015006341U1
Authority
DE
Germany
Prior art keywords
chambers
valves
sterility
cassette
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE202015006341.1U
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE202015006341.1U priority Critical patent/DE202015006341U1/en
Publication of DE202015006341U1 publication Critical patent/DE202015006341U1/en
Expired - Lifetime legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/02Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06Pumps having fluid drive
    • F04B43/073Pumps having fluid drive the actuating fluid being controlled by at least one valve
    • F04B43/0736Pumps having fluid drive the actuating fluid being controlled by at least one valve with two or more pumping chambers in parallel
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/71Suction drainage systems
    • A61M1/72Cassettes forming partially or totally the fluid circuit
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/80Suction pumps
    • A61M1/82Membrane pumps, e.g. bulbs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007Methods or devices for eye surgery
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/12General characteristics of the apparatus with interchangeable cassettes forming partially or totally the fluid circuit
    • A61M2205/128General characteristics of the apparatus with interchangeable cassettes forming partially or totally the fluid circuit with incorporated valves
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2210/00Anatomical parts of the body
    • A61M2210/06Head
    • A61M2210/0612Eyes

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Vascular Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • External Artificial Organs (AREA)

Abstract

Kunststoffkassette (A) bestehend aus zwei Pumpkammern (F) pro Pumpgruppe, jeweils durch eine flexible undurchlässige Membran (G) unterteilt, vier Ventilen (B), (C), (D), (E) pro Pumpgruppe und Verbindungsleitungen, dadurch gekennzeichnet, dass mit einem pneumatisch geregeltem Antrieb (M), (I), (J) sterile Fluide mit nahezu zeitlich konstantem Volumenstrom abgesaugt oder gefördert werden können, wobei stets die Sterilität bewahrt wird.Plastic cassette (A) consisting of two pumping chambers (F) per pumping group, each divided by a flexible impermeable membrane (G), four valves (B), (C), (D), (E) per pumping group and connecting lines, characterized that with a pneumatically controlled drive (M), (I), (J) sterile fluids can be sucked off or conveyed with an almost constant volume flow, whereby always the sterility is preserved.

Description

Fluidpumpen zur Absaugung oder Förderung von biologischen Fluiden, z. B. Körperfluiden oder Körperersatzfluiden, insbesondere bei der Anwendung der Augenchirurgie, werden meist als Peristaltik- oder Venturipumpen ausgeführt. Während Peristaltikpumpen die Sterilität des zu pumpenden Mediums gewährleisten, entstehen beim Pumpen unerwünschte Pulsationen. Bei Venturipumpen sind die Pulsationen nicht vorhanden, können aber die Sterilität nicht gänzlich gewährleisten. Ähnliches gilt bei Kombinationen dieser beiden Pumparten oder bei üblichen Membranpumpen, bei denen die Pumpeinheit nicht als steriles Element ausgeführt ist. Zur Problemlösung wird die im Folgenden beschriebene Membranpumpe verwendet. Dabei ist die Pumpeinheit steril und auswechselbar in der Art einer Kassette (A) ausgeführt. Mit der Verwendung von zwei Membranen (G) pro Pumpengruppe können neben der Gewährleistung der Sterilität auch pulsationsfreie oder zumindest pulsationsarme Pumpvorgänge durch zeitgesteuerte oder druckgeregelte Ventilschaltungen erzielt werden. Die Entkopplung des zu pumpenden Fluides wird durch die druckdichte Trennmembran (G) und dem pneumatischen Antrieb (M), (I), (J) erreicht. Die Pumpengruppe wird in einer Kassette (A) mit Ventilen (B), (C), (D), (E) und Verbindungsleitung zusammengefasst und kann z. B. im Spritzgussverfahren kostengünstig und in hoher Stückzahl gefertigt werden. Es handelt sich um eine in einer Kunststoffkassette (A) integrierte Pumpengruppe, die sowohl saugen, als auch fördern kann. Die Pumpeneinheit besteht aus zwei Kammern (F), (H) mit jeweils einer flexiblen Membran (G), die die Kammern unterteilen. Es existieren jeweils eine Luftkammer (H) und eine Fluidkammer (F). Die Luftkammern (H) dienen dem Antrieb der Pumpe und werden mittels der Druckregler I(I) & II(J) mit der zeitlich veränderbaren Drücke pI(t)(N) und pII(t)(O) beaufschlagt. Sowohl Unterdruck, als auch Überdruck – bezogen auf Atmosphärendruck – ist separat regelbar, sodass sich die Membranen (G) beidseitig und unabhängig auslenken können. Die Druckregler (I), (J) werden mittels einer Druckluftversorgungs- und Luftaufbereitungseinheit (M) gespeist. Durch die sich auslenkenden fluiddichten Membranen (G) werden die Volumina der Fluidkammern (F) zeitlich verändert und in Folge deren Drücke. Mit der angepassten wechselseitigen Schaltung der Ventile (B), (C), (D), (E) wird dadurch ein Volumenstrom erzeugt. Die Größe des Volumenstromes hängt von der Druckbeaufschlagung der Luftkammern (H) ab. Die beiden Auslassventile (I-1(B) & II-1(D)), als auch beide Einlassventile (I-2(C) & II-2(E)) werden in einer zeitlichen Abfolge sinnvoll geschaltet, sodass während die eine Fluidkammer (F) saugt bzw. fördert, fördert bzw. saugt die andere Kammer. Das Saugen bzw. Fördern geschieht somit immer wechselseitig. Die Drücke der Fluidkammern (F) werden unmittelbar vor dem Umschalten der Ventile (B), (C), (D), (E) gleichwertig eingestellt, sodass sich keine oder nur geringe Druckschwankungen in den Fluidkammern (F) ergeben. Ziel ist die Erreichung eines zeitlich konstanten Volumenstromes.Fluid pumps for the extraction or delivery of biological fluids, eg. As body fluids or body replacement fluids, especially in the application of ophthalmic surgery, are usually designed as peristaltic or Venturi pumps. While peristaltic pumps ensure the sterility of the medium to be pumped, unwanted pulsations occur during pumping. In venturi pumps, the pulsations are absent but can not fully guarantee sterility. The same applies to combinations of these two pumps or conventional diaphragm pumps, in which the pump unit is not designed as a sterile element. To solve the problem, the diaphragm pump described below is used. The pump unit is sterile and interchangeable in the manner of a cassette (A) executed. With the use of two membranes (G) per pump group, pulsation-free or at least low-pulsation pumping processes can be achieved by time-controlled or pressure-controlled valve circuits in addition to ensuring sterility. The decoupling of the fluid to be pumped is achieved by the pressure-tight separation membrane (G) and the pneumatic drive (M), (I), (J). The pump group is combined in a cassette (A) with valves (B), (C), (D), (E) and connecting line and can, for. B. are manufactured inexpensively and in large quantities by injection molding. It is a pump unit integrated into a plastic cassette (A) that can both suck and convey. The pump unit consists of two chambers (F), (H) each with a flexible membrane (G), which divide the chambers. There are each an air chamber (H) and a fluid chamber (F). The air chambers (H) are used to drive the pump and by means of the pressure regulator I (I) & II (J) with the time-varying pressures p I (t) (N) and p II (t) (O) acted upon. Both negative pressure and overpressure - based on atmospheric pressure - can be regulated separately, so that the membranes (G) can deflect on both sides independently. The pressure regulators (I), (J) are fed by means of a compressed air supply and air treatment unit (M). Due to the deflecting fluid-tight membranes (G), the volumes of the fluid chambers (F) are changed over time and as a result of their pressures. With the adapted mutual switching of the valves (B), (C), (D), (E) thereby a volume flow is generated. The size of the volume flow depends on the pressurization of the air chambers (H). The two exhaust valves (I-1 (B) & II-1 (D)), as well as both intake valves (I-2 (C) & II-2 (E)) are made meaningful in a timed sequence so that while one Fluid chamber (F) sucks or promotes, promotes or sucks the other chamber. The sucking or conveying thus always happens mutually. The pressures of the fluid chambers (F) are set equal to each other immediately before the switching of the valves (B), (C), (D), (E), so that no or only small pressure fluctuations in the fluid chambers (F) result. The aim is to achieve a constant flow over time.

Das System oder die Konsole, in die die Kunststoffkassette integriert ist, weißt optional eine Messvorrichtung zur Erfassung des zeitlich veränderlichen Volumens der beiden Fluidkammern (F) oder der Luftkammern (H) auf, z. B. kann die Bewegung der Membran (G) über eine Wegmessung erfasst werden. Somit kann der zeitlich veränderliche Volumenstrom gemessen werden. Die Pumpengruppe, bestehend aus Pumpkammern (F), (H), Membranen (G), Ventilen (B), (C), (D), (E) und Verbindungsleitungen, sind in einer Kunststoffkassette (A) integriert und kann z. B. im Spritzgussverfahren hergestellt werden. Durch diese Anordnung ist eine Medientrennung (Bewahrung der Sterilität) erreicht. Die Kassette (A) ist wasch- und sterilisierbar und kann als Pumpengruppe u. a. zum Absaugen oder Fördern von biologischen Fluiden, z. B. Körperfluiden oder Körperersatzfluiden, verwendet werden. The system or console, in which the plastic cassette is integrated, optionally has a measuring device for detecting the time-varying volume of the two fluid chambers (F) or the air chambers (H), z. B., the movement of the membrane (G) can be detected by a displacement measurement. Thus, the time-varying volume flow can be measured. The pump group, consisting of pumping chambers (F), (H), membranes (G), valves (B), (C), (D), (E) and connecting lines are integrated in a plastic cassette (A) and z. B. are produced by injection molding. By this arrangement, a media separation (preservation of sterility) is achieved. The cassette (A) is washable and sterilizable and can be used as a pump group u. a. for aspirating or conveying biological fluids, eg. As body fluids or body replacement fluids are used.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

  • (A):(A):
    Kassettecassette
    (B):(B):
    Ventil I-1Valve I-1
    (C):(C):
    Ventil I-2Valve I-2
    (D):(D):
    Ventil II-1Valve II-1
    (E):(E):
    Ventil II-2Valve II-2
    (F):(F):
    Fluidkammerfluid chamber
    (G):(G):
    Flexible MembranFlexible membrane
    (H):(H):
    Luftkammerair chamber
    (I):(I):
    Druckregler IPressure regulator I
    (J):(J):
    Druckregler IIPressure regulator II
    (K):(K):
    Anschluss INConnection IN
    (L):(L):
    Anschluss OUTConnection OUT
    (M):(M):
    Druckluftversorgungs- und LuftaufbereitungseinheitCompressed air supply and air treatment unit
    (N):(N):
    pI(t)p I (t)
    (O):(O):
    pII(t)p II (t)

Claims (1)

Kunststoffkassette (A) bestehend aus zwei Pumpkammern (F) pro Pumpgruppe, jeweils durch eine flexible undurchlässige Membran (G) unterteilt, vier Ventilen (B), (C), (D), (E) pro Pumpgruppe und Verbindungsleitungen, dadurch gekennzeichnet, dass mit einem pneumatisch geregeltem Antrieb (M), (I), (J) sterile Fluide mit nahezu zeitlich konstantem Volumenstrom abgesaugt oder gefördert werden können, wobei stets die Sterilität bewahrt wird.Plastic cassette (A) consisting of two pumping chambers (F) per pumping group, each divided by a flexible impermeable membrane (G), four valves (B), (C), (D), (E) per pumping group and connecting lines, characterized that with a pneumatically controlled drive (M), (I), (J) sterile fluids can be sucked off or conveyed with an almost constant volume flow, whereby always the sterility is preserved.
DE202015006341.1U 2015-09-08 2015-09-08 pump cassette Expired - Lifetime DE202015006341U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE202015006341.1U DE202015006341U1 (en) 2015-09-08 2015-09-08 pump cassette

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202015006341.1U DE202015006341U1 (en) 2015-09-08 2015-09-08 pump cassette

Publications (1)

Publication Number Publication Date
DE202015006341U1 true DE202015006341U1 (en) 2015-11-06

Family

ID=54707155

Family Applications (1)

Application Number Title Priority Date Filing Date
DE202015006341.1U Expired - Lifetime DE202015006341U1 (en) 2015-09-08 2015-09-08 pump cassette

Country Status (1)

Country Link
DE (1) DE202015006341U1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018054834A1 (en) * 2016-09-20 2018-03-29 Medela Holding Ag Device for suctioning bodily fluids and for supplying a substance
EP3318226B1 (en) 2016-11-03 2021-01-06 This AG Clean venturi aspiration
US11090417B2 (en) 2016-09-20 2021-08-17 Medela Holding Ag Suctioning and supply device with drive unit and connecting part

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018054834A1 (en) * 2016-09-20 2018-03-29 Medela Holding Ag Device for suctioning bodily fluids and for supplying a substance
CN109789251A (en) * 2016-09-20 2019-05-21 美德乐控股公司 Device for aspirating body fluid and for conveying substance
EP3603689A1 (en) 2016-09-20 2020-02-05 Medela Holding AG Device for siphoning bodily fluids and for delivering a substance
US11090417B2 (en) 2016-09-20 2021-08-17 Medela Holding Ag Suctioning and supply device with drive unit and connecting part
CN109789251B (en) * 2016-09-20 2021-12-28 美德乐控股公司 Device for aspirating body fluids and for delivering substances
US11644026B2 (en) 2016-09-20 2023-05-09 Medela Holding Ag Device for suctioning bodily fluids and for supplying a substance
EP3318226B1 (en) 2016-11-03 2021-01-06 This AG Clean venturi aspiration
US11786398B2 (en) 2016-11-03 2023-10-17 This Ag Sterile Venturi aspiration

Similar Documents

Publication Publication Date Title
DE102012102274B4 (en) piston pump
US8523839B2 (en) System and method for pumping intravenous fluid
DE202015006341U1 (en) pump cassette
EP1391611B1 (en) Constant output fluidic system
EP2665934B1 (en) Piston pump; device for feeding and metering a fluid for medical purposes by means of a piston pump
DE3428828A1 (en) DEVICE FOR CONVEYING MECHANICAL STRESS HIGH-SENSITIVE LIQUIDS
ATE449259T1 (en) HOSE FOR HOSE PUMP
US11300120B2 (en) Displacement pump for medical liquids, blood treatment device, and method for controlling same
WO2006122268A2 (en) Sanitary diaphragm pump for critical bioprocess applications
ATE292485T1 (en) PUMPING SYSTEM
DE60325479D1 (en) DISTRIBUTABLE COLLECTION FOR AUTOMATED AND ASEPTIC TRANSMISSION OF SOLUTIONS IN BIOLOGICAL APPLICATIONS
DE102012113087A1 (en) Pump for medical purposes
US10240596B2 (en) Sterilizable pump unit
EP0659444B1 (en) Apparatus for pumping blood
EP3179108A3 (en) Pump with adjustable transport volume
DE102012102273A1 (en) Device for feeding and dosing a fluid for medical purposes
CN110877770A (en) Double-layer disposable liquid storage bag and constant-pressure conveying device thereof
WO2021128684A1 (en) Accommodation member, pump head and pressure pump
US20120282118A1 (en) Reciprocation Pump And A Dialysis Apparatus Equipped With The Reciprocation Pump
BR112016024380A2 (en) pumping method and system
CN108474366B (en) Blood treatment apparatus comprising a dispensing line with a diaphragm pump and a valve and method for dispensing
GB819064A (en) Improvements in or relating to pumps
EP1970269A3 (en) Telescopic nozzle, particularly in a headlight cleaning device
WO2020232364A1 (en) Compact controlled valve with integrated orifices for precise mixing
CN108780020A (en) pressure measurement

Legal Events

Date Code Title Description
R086 Non-binding declaration of licensing interest
R207 Utility model specification
R156 Lapse of ip right after 3 years